Copper alloy.



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WILLIAM F. NOLAN, OI ST. IEAUL, MINNESOTA,

COPPER ALLOY.

No Drawing.

Specification of Letters Patent.

Application 'filed April 19, 1912. Serial No. 691,978.

To all whom it may concern:

Be it known that I, WILLIAM F. NOLAN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Copper Alloy, of Which the following is a specification.

Mfy invention relates to means and process or hardening copper and brass, and'the object of the invention is to enable articles made of copper or of brass, or of any alloy ,containing copper, to retain its form and finish of surface under considerable pressure, and to be more durable when exposed to friction, as in journal boxes, .and to perform service as cutting tools for wood and other material.

The invention involves an alloy which may be considerably varied without diverging from the scope and spirit of the invention.

My composition consists of the following I ingredients combined in the proportions stated, viz:

Copper 98.15 per cent.

Manganese 1.48 per cent. Vanadium 0. 25 per cent. Aluminum O. 12 per cent."

These ingredients are compounded and used as follows: Put the manganese, the vanadium and the aluminum in a crucible and apply heat until they commence to melt, then put in a small quantity of borax; as soon as the borax is applied put in the copper; melt the mass unt-ilit flows freely, then I mix it by stirring, and pour it in molds. While yet dark red remove it from the mold and immerse it in oil Whale oil or lard oil is suitable. In this way the copper will be about as 'hard as tool steel that has been fully hardened and then drawn to a blue color. If a greater or less hardness is desired, increase or decrease the other ingredients of the compound without changing the quantity of'the co or or brass to be hardened. If the artic e thus molded is to be drilled, turned, planed or filled, such work should be done before the article is immersed in the oil, and after the machine Work is done the article should be heated to a dark red color and immersed in the oil. From this description it will be understood that the brass or copper having said compound mixed into it may have its temper drawn out byheat, and may he hardened at any time by heating it and immersing it in oil.

What I claim is:

nese, vanadium and aluminum.

2. An alloy consisting of copper, manganese, vanadium and aluminum in about the following proportions: copper 98.15 per cent, manganese 1.48 per cent, vanadium 0.25 per cent, aluminum 0.12 per cent.

In testimony whereof I aflix my. signature. in presence of two witnesses.

WILLIAM F. NOLAN. Witnesses:

' J. M. BnMANs,

J.- L. SMrrH.

1. An alloy consisting of copper, manga- 

